Diamond millstone-dressing machine



(No Model.) 2 Sheets-Sheet 1.

' 0. s. HOGVER. J DI'AMOND MILLSTONE DRESSING-MAGHINE.

No. 247,826. Patented Oct. 4,1881.

(No Model.)

' 2 Sheets-Sheet 2. V

G. S. HOOVER.

DIAMOND MILLSTONE DRESSING MACHINE.

Patented Oct. 4,1881.

751" teams UNITED STATES.

PATENT OFFICE. 7

OORNELIOUS S. HOOVER, OF LANCASTER, PENNSYLVANIA.

DIAMOND MlLLSTONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 247,826, dated October4, 1881. Application filed March 25, 1881. (N0 model.)

Dressing Machines; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention is an improvement on the machine described and shown inmy patent dated October 7,1879, and numbered 220,242. The object of saidimprovement is to provide convenient means for tilting one side or theother of the guide-frame, so as to adjust and hold the tool in aninclined position suitable for operating on the furrows of a left-handdress or a right-hand dress, as desired. The devices employed toaccomplish this object will be hereinafter more fully setforth andclaimed.

In the accompanyingdrawings, Figure 1 represents a perspective view of amachine embodying my invention. Fig. 2 represents a detail view of theguide-frame for the carriage, with the locking-pins andadjusting-screws. Fig. 3 represents, in perspective, another form of myimproved machine, in which the guideframe has gudgeons (one at themiddle of each end) instead of said pins; and Fig.4 represents, inperspective, another form of my improved machine, in which the tiltingis effected by means of screws which pass through straps or platesconnected to a pair of wings and into the corners of the bed-plate or apermanent attachment to the guide-frame. Fig. 5 represents an endviewwith the modifications shown in Fig. 4. Fig. 6 represents a detail viewof the side locking-pin shown in Fig. 1, and proximate devices, thelatter being partly in section.

A designates'the bed-plate of my machine; B, the guide-flanges; O, theslide which rests upon and is guided by said flanges; D, the crossguide-bars on said slide; E, the diamondcarrier, which movestransversely to flanges with said cam and rotate said screw when the.

slide reaches one end of the machine. The construction, arrangement, andoperation of the above parts are substantially't-he same as in myprevious patent above mentioned. The machine described in said patentis, however, provided'with no means for adjusting the tool and diamondto an inclined position to the right or left for dressing furrows. Mypresent improvement adds this adjustability and provides for loekin gthe guide-frame in the positionof adjustment thus taken. To accomplishthis I employ anyone of the several constructions hereinafter described.That which I prefer is shown in Figs. 1 and 2, which show theguide-flanges B B made separate from the bed-plate A and united by endbars or flanges, b b, to form a rectangularguide-frame, B. Thisguide-frame sets intoac'orresponding central recess of the bed-plate,which leaves room enough for the adjustment hereinafter described, andsaid guide-frame is supported by detachable pins 0 O, which pass throughend flanges of the base-plate, and into or through the end flanges, bb,of the guide-frame. These pins are four in number, one pair(designated 0) being on the left side of the central longitudinal lineof the machine, and the other pair (designated 0) being on the rightside of the said line. 7

When all the pins are in place the frame B is locked in a horizontalposition. When, however, either pair of pins is removed the other pairserve as gudgeons or trunnions for the frame B to turn upon, so that theother side can be tilted up, thus giving the entire frame an incline,and inclining also the slide, the tool-carrier, the tool, and thediamond. This adjustment is effected by four screws arranged in thesidesof the frame and working down through the same against the inner part ofbedplate A, which is extended under the edge of said guide-frame, orinto or against lugs formed on the inner edge of said plate. Thesescrews are arranged respeetivelynear the four corners of saidguideframe, the two screws on the right being designated P and the twoon the left being designated I. By screwing one pair up and the otherdown the frame B can be tiited as desired,and they will hold said framefirmly in the inclined position thus given.

Sometimes,as shown in Fig. 3,I use a frame having two gudgeons, Q Q,permanently attached thereto and turning in bearings q g on thebed-plate. In this case no removable pins are used as gudgeons, butthcadjusting-screws are employed, as before. To still further secure theframe B in its inclined position, a pin, R, is run in through a sideflange of the bedplate and undera lug attached to said frame B.

In Fig. 4 I have shown a form of my machine in which neither gudgeonsnor detachable pins are used. The bed-plate A and the frame B arerigidly attached together, and they have a yieldiugconncction with twowings, S S, by means of straps s 8 (four in number) and the fouradjusting-screws. These screws pass through the curved and threadedinner ends of the straps and into suitably-threaded recesses in the topof the bed-plate. The straps are permanently secured to the flat wings SS. By adjusting the screws up on one side and down on the other side, asbefore, the desired inclination is given and retained. These screws havepreferably a swivel-connection with the straps.

The improvement herein described, though specially designed for use withthe machine described in my previous patent, may also be applied to anyother machine of the same general nature.

The pins hereinbet'ore described are preferably ot tapering shape, andset into correspoudin g recesses and perforations. Au y other suitableform maybe employed; butthey should be guarded against displacement.

I am aware that it is not broadly new to adjust the guide-frame ofmillstone-drcssing machines so that it will tip laterally, nor to employadjusting-screws for that purpose, nor to provide such frames withremovable pivots, and therefore I do not broadly claim sucheonstructions or any of them; but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In adiamond millstonedressingmachine, the combination of a fixedframe or support with a pivoted guide-frame for the slide and holder andadjustingscrews passing down through the sides of the movable frame andinto the fixed frame, to provide for the pivoted. adjustment of saidguide-frame, so that either side thereof may be tilted.

2. The combination, with a bed-plate and tilting guide-frame, of twopairs of removable pivot-pins inserted in the ends of the said tilt ingframe, one pair being on one side of the central line thereof and theother pair on the other side thereof, in order that the insertion of allfour pins may lock the frame in horizontal position and the removal ofeither pair will allow the other side of the frame to be adjusted upwardor downward, substantially as and for the purpose set forth.

3. The combination of a side locking-pin, R, with a tilting guide-frame,the four adjustingscrews P, and a baseplate, substantially as set forth.

In testimony whereof I at'tix my signature in presence of two witnesses.

()ORNELIO US S. HOOVER.

Witnesses:

ZENIEL Sworn, LEVI K. LANDIS.

